OF SOUTHERN INDIA. 343 



85-87. — A. Aptieiisis and Fltioni, P. and C.,. and Austeni, d'Orb.; would appear to belon<'' 

 to Trigonoarca. 



88. — A, costellata, Sow., agrees in the character of the hinge with Gramiiialodon. Nyst 

 suggests that the species is identical with Sowerby^s Cucullaa carinata. 



89. — A. Forbesi, P. and C, is either a Cucullaa or a Trigonoarca. 



90. — A. gurgitis, P. and R., is apparently a true Area. 



91-94.. — A. Eugardiana, d'Orb.^ Trihuleti, P. and C, Favriua, P. and 'R.., aii(\. Riconleana, 

 Cott, are Barbatia. 



95. — A. carinata, Sow. This resembles an Area in shape, but as the shell is unequi valve, it 

 more probably belongs to Grammalodon, or some of the sub-genera of Cttcullaa. 



96-102.— J. Campichiana, P. and R., Cotlaldiiia, d'Orb. ,«««(?, Leym., i«i«a««, P. and R., 

 Hebertiana, Cott., hiparfita, P. and R., (uou biparftta, Riim., isao,) and m/(/£;//6m, P. and C, 

 appear to belong to Trigonoarca. 



10-S. — A. glabra, Park., (fibrosa apud d'Orbigny), is a CucuUaa. 



104 — A. obesa, P. and R., (non A. obesa. Sow., 1833), probably a Trigonoarca. 



105. — A. rotundata, Sow., (^=A. rotundita, Nyst; non Cacul. rotiiudata, Rom., 1836, et 

 1837=^. dulmanensis, Nyst), is a Barbatia. 



106. — A. formosa, Sow., (=A. venusta, Nyst), apparently a Trigonoarca. 



107. — A. elongata, Brown, (non Cue. elongata, Sow.), a Macrodon. 



108-109. — A. pJioladiformis and elongalula, Nyst, ISIS (= Sarlhacensis, d'Orb., iSoO ^= 

 elegans, d'Orb., 1844, non eadem auctorum) belong to Area. 



110-111. — A. Galliennei and Feudiuensis, d'Orb., are Barbatia. 



112. — A. Albertina, d'Orb., apjiarently a Trigonoarca. 



113. — A. Cenomanensis, d'Orb.; this would appear to be a true CucuUaa. 



114. — A. Tailburgenais, d'Orb., is a Trigonoarca. 



115. — A. inseripta, d'Arch., a Barbatia. 



116, — A. subacuta. Sow., apparently an Anomalocardia. 



117. — A. echinata, d'Orb., is one of the forms intermediate between Barbatia and Area. 



118. — A.subdinensis, d'Orb., strongly resembles in form Deshayes' Cucullaria. 



119. — A. serrata, d'Orb., a true Area. 



120-125. — A. Giierangeri, Moutoniana, Mailleana, Marceana, Bassi/ana, and Ligericnsis of 

 d'Orbigny all belong to Trigonoarca. 



126. — A. Renauxiana, Math., is a true Area. 



127-128. — A. Easpailli, d'Orb., Eeqitieniana, Math., are Barbatia of the type of Conrad's 

 Cucullaarca ; they have the general form and the posterior flattening of the hinge line of Barbatia, 

 and the teeth do not appear to me to be more elongated than in large specimens of the recent 

 Bar. vclata ; I believe, therefore, that there is not sufficient ground for the constitution of a distinct 

 sub-genus. 



129. — A. Bufrenoyi, Haime, a true Area. 



130-134. — A. setnisulcata, Math., Noueliana, Beaumontii, Matheroniana of d'Orbigny, Du- 

 mortieri, Haime, belong to Trigonoarca. 



135. — A. affinis, Duj., very insufficiently figured; the species may belong to Area or Barbatia. 



136-137. — A. 7iereis and expansa, Nyst, 1848, (alaia, Math., 1842, subalata, d'Orb., 1850), 

 are probably Barbatia. 



138-147. — A. Archiaeiana and sagittata, d'Orb., lavis, Mariiccnsis, and Galloprovineialis of 

 Matheron, Santonensis, d'Orb., Orljignyana* Math., Royaua and cretacea, d'Orb., all appear to 

 belong to Trigonoarca. 



* Nyst suggests that this species is probahly tertiary, but does uot give the authority for this supposhion. 



4 p 



